Pill bugs look like little armadillo insects that roll up into a ball when conserving moisture, when frightened or at whim. They thrive in moist conditions, typically around decaying organic matter or under wet objects that contact the soil. These are the “roly-polys” you find in the yard, but once they invade your home in large numbers, a pill bug infestation is no laughing matter.
Pill bugs (Armadillilium vulgar) are arthropods of the Malacostraca class, Isopoda order, and Armadillidiidae family. They grow up to 3/4-inch long and have oval-shaped bodies covered in hard, shell-like plates. They are described as the only crustaceans that live completely on land. Pill bugs are scavengers that feed off of decaying vegetation, and they are nocturnal creatures, so expect to see them busy at night.
Pill bugs do not pose any threat of disease, nor do they contaminate food. They are attracted to moist conditions and will enter a home with a moisture problem around its foundation, doors or windows. Without the moisture, pill bugs cannot survive indoors. Once inside, moist, dark and dusty conditions give pill bugs a safe environment from their natural predators, including spiders, frogs, and small animals. The pill bugs are then free to multiply, posing an infestation problem for the homeowner.